216343678 has 16 divisors (see below), whose sum is σ = 330946560. Its totient is φ = 106038616.

The previous prime is 216343669. The next prime is 216343691. The reversal of 216343678 is 876343612.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 216343678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42801 + ... + 47587.

It is an arithmetic number, because the mean of its divisors is an integer number (20684160).

Almost surely, 2^216343678 is an apocalyptic number.

216343678 is a deficient number, since it is larger than the sum of its proper divisors (114602882).

216343678 is a wasteful number, since it uses less digits than its factorization.

216343678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231.

The product of its digits is 145152, while the sum is 40.

The square root of 216343678 is about 14708.6259725373. The cubic root of 216343678 is about 600.3180517457.

The spelling of 216343678 in words is "two hundred sixteen million, three hundred forty-three thousand, six hundred seventy-eight".